纸浆生物漂白的研究进展

生物漂白是利用微生物分泌的木素降解酶酶系，在木聚糖酶的协同作用下，分解纸浆中的残余木素，并使之降解溶出的过程，其目的主要是提高纸浆的可漂性（以纸浆kappa值、粘度和白度的趸化作为衡量的指标），降低漂白化学药品用量，从而降低漂白废水污染负荷。主要从以下三个方面进行研究：（1）微生物（白腐菌）直接作用纸浆进行生物漂白；（2）半纤维素酶参与的纸浆生物漂白；木素降解的生物漂白。目前纸浆生物漂白新工艺无疑是制浆技术革新中最有发展前景、最诱人的课题之一。如果能用酶完全取代化学试剂进行生物漂白，可从源头上解决困扰造纸工业发展的漂白废水污染问题。我国在纸浆生物漂白方面的研究才刚刚起步，目前还处于实验室研究阶段，应用于工厂实践还需借鉴国外的先进经验。因此，关于这方面技术，值得我们继续去研究、开发。

Advances In Biobleaching Of Pulp

Biobleaching is the processing to make residual tignin degraded and resolved by degrading enzyme groups produced by microbes, coordinating with xylanase. The main purpose is to enrich the bleaching abilities （valuated by the changed number of Kappa value, viscosity and brightness） of pulp, decrease the usage of bleaching chemicals, and reduce the pollutant in bleaching waste water. The researches are carried mainly on the following three ways： （1） processed by microbes （White-rot fungi） straightly; （2） pretreated by hemicellulase; （3） biobleaching with lignin degraded. Now, there is no doubt that new project of biobleaching is one of the most perspective and attempting subjects in innovation of pulping. We will get rid of the pollution of bleaching water that disturbing development of Paper Industry essentially, when we managed to replace the bleaching agents totally with enzymes. In our country, the studying on biobleaching is just started off, and is still in the lab stage. If applying in factory, we should refer to the alien advanced periences. So, there is a long way for us to research and develop on this technology.